Microsoft Word - Chemistry Cookie Project- Chocolate Chip.doc



5448300-45720000Chemistry Cookie Project –Chocolate ChipIn this lab you will be converting a recipe from moles to standard cooking measurements and then using that recipe to bake some cookies!You will need the following tables in order to convert your recipe:Molecular Formula TableUse the following molecular formulas to calculate grams of ingredients.NOTE: Most of these substances have extremely complex molecular formulas. I have greatly simplified your project by listing a representative formula only.AniseC10H12OBaking SodaNaHCO3Baking PowderNaHCO3Brown SugarC12H22O11ButterC9H14O6White (Cane) SugarC12H22O11ChocolateC4H8O4CinnamonC9H8OClovesC10H12O2Cream of tartarKHC4H5O6AniseC10H12OBaking SodaNaHCO3Baking PowderNaHCO3Brown SugarC12H22O11ButterC9H14O6White (Cane) SugarC12H22O11ChocolateC4H8O4CinnamonC9H8OClovesC10H12O2Cream of tartarKHC4H5O6FlourC4H8O4Lemon Juice (extract)C6H8O7MargarineC9H12O6Milk85% H2O15% C9H14O6MolassesC12H22O11PepperC17H19O3NSaltNaClVanillaC8H8O3EggsC6H12O3N2FlourC4H8O4Lemon Juice (extract)C6H8O7MargarineC9H12O6Milk85% H2O15% C9H14O6MolassesC12H22O11PepperC17H19O3NSaltNaClVanillaC8H8O3EggsC6H12O3N2Unit ConversionsUse the following conversions to get from grams to a standard cooking unit of measure.1 teaspoon of baking soda = 2.84g1 teaspoon of vanilla extract = 4.73g 1 large egg = 50g1 cup flour = 141.95 g1 teaspoon salt= 4.16 g1 cup butter = 236.59 g1 cup sugar =198.73 g1 cup brown sugar = 141.46 g1 ounce chocolate chips = 28.35 g 1 tablespoon lemon juice = 14.20 g 1 teaspoon baking powder = 2.84 g1 teaspoon cream of tartar = 2.84 g 1 teaspoon cinnamon = 2.84 g5378450-57149900Chocolate Chip CookiesYield: 4 Dozen 2-1/2 inch Cookies Ingredients:1.602 x 1024 molecules of flour0.0335 mol baking soda2.168x1022 molecules of salt1.084 mol butter (at room temp)0.44 mol white sugar0.31 mol packed brown sugar 0.624 mol eggs0.062 mol vanilla2.82 mol Chocolate ChipsConversion InstructionsBegin by converting moles to grams or molecules to moles to grams for each ingredient and record the grams in the table below. Show all work on a lined piece of paper that clearly indicates which ingredient you are solving for. Next, convert the number of grams to your final baking measurement; again record the measurements in the table below.Attach your calculation to this sheet when you turn in the lab.Baking Instructions:Preheat oven to 375°F. Stir flour with baking soda and salt; set aside. In large mixer bowl, cream butter with sugar, brown sugar, eggs and vanilla. Gradually blend dry mixture into creamed mixture. Stir in the Chocolate Chips. Drop tablespoon of dough per cookie onto ungreased cookie sheets. Bake at 375°F for 10-12 minutes or until golden brown.IngredientGramsBaking MeasurementsIngredientGramsBaking MeasurementsFlourBrown sugarBaking sodaEggsSaltVanillaButterChocolate ChipsSugarShow full solutions for separate sheet of paper for each ingredient. Example to be put on board for expectation on how to solve for each ingredient. We will be baking cookies based on their mole conversions!Flour: Given: 1.602 x 1024 molecules of flour Formula C4H8O4 1 cup flour = 141.95 g Required: n = ?Formula: n = # molecules = 1.602 x 1024 = 2.660 moles NA 6.022 x 1023 m = n x MM = 2.660mol x 120.104 g/mol = 319.5g Conversion: 319.5 / 141.95 = 2.25 cups = 2 ? cups ................
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